Building a lazer beam for coyotes

[Camp Cook]

What bullet weight are you going to be shooting in that 1 - 9" twist?

I'm thinking that it will have trouble stabilizing bullets lighter than 80grs.

 

[rig_pig69]

Well, i'm gunna try and stick with 87 to 105 ish. I'm hoping with the AI version i can push the 90 gr scenar, or the 90 gr scirocco's to 3800 ish. I found some other sources claiming it's doable with this case, so i guess we'll see. Both rounds have a bc of .420....

 

[Big JD-From the hills]

So what kind of distances are you thinking of shooting with this unit???

 

[rig_pig69]

So what kind of distances are you thinking of shooting with this unit???

With the bullets i've sorta got in mind... i would think anywhere from here to say..................... wayyyyyyyyyyyyyy over there
I dunno, I'd like to think out to 7 or 800 on the yotes that don't want to come in.

 

[Cummins4x4]

Any body got a ballistics program to see what kind of trajectory this screamer will have?

 

[Camp Cook]

.243" 90gr Scirroco
.419 BC
3800fps muzzle velocity

Advanced Ballistics Calculator - maximum point blank range is 369 yds when zeroed at 316 yds.

Numbers in bold = Velocity numbers to the right are ft lbs energy

Muzzle -1.5 3800 2886
50 1.1 3664 2683
100 3.0 3533 2494
150 4.2 3405 2317
200 4.7 3281 2151
250 4.4 3161 1996
300 3.2 3043 1851
350 1.1 2929 1714
400 -2.1 2817 1586
450 -6.3 2709 1466
500 -11.8 2603 1354
550 -18.5 2499 1248
600 -26.6 2399 1150
650 -36.2 2301 1058
700 -47.4 2205 972
750 -60.5 2111 891
800 -75.5 2019 815

Theoretically this is a 650 - 700 yard deer load...

 

[rig_pig69]

Well... wonder what 55gr SGK's could do... if they don't grenade at the muzzle??

 

[rig_pig69]

.243" 90gr Scirroco
.419 BC
3800fps muzzle velocity

Advanced Ballistics Calculator - maximum point blank range is 369 yds when zeroed at 316 yds.

Numbers in bold = Velocity numbers to the right are ft lbs energy

Muzzle -1.5 3800 2886
50 1.1 3664 2683
100 3.0 3533 2494
150 4.2 3405 2317
200 4.7 3281 2151
250 4.4 3161 1996
300 3.2 3043 1851
350 1.1 2929 1714
400 -2.1 2817 1586
450 -6.3 2709 1466
500 -11.8 2603 1354
550 -18.5 2499 1248
600 -26.6 2399 1150
650 -36.2 2301 1058
700 -47.4 2205 972
750 -60.5 2111 891
800 -75.5 2019 815

Theoretically this is a 650 - 700 yard deer load...

So, do you think those are achievable numbers, or am i expecting to much??

 

[Camp Cook]

If I can push a 90gr Barnes X @ 3500fps from a 21" barreled 6mm-284 and giving an est 50fps velocity gain per inch would be a gain of appr 250fps for a 5" longer barrel = 3750fps.

Yeah I say it should be doable...

 

[Big JD-From the hills]

I would also factor in windage especialy on the prairies... looks good on paper but even if you hold moa out to 500yards in the feild..... your still going to have a real good chance at missing at 700yards or greater anyway. One benefit that this quick of a rifle will have though is running shots at 200 or so yards would be slightly easier.

 

[Wrong Way]

Wann go REALLY fast? Build your own......17/243 middlestead

 

[Camp Cook]

I've been thinking about rechambering my 26" barreled Ruger M77 to 22-middlested or 22-243 only thing that has been stopping me is its 1 - 12" twist.

 

[a j cave]

Camp Cook-nice chart! 2 things to note for most of us, the bullet drop in 50 yd changes( need a damb good range finder). The second that range at which energy drops below 1000lbs. This, I belive, is the energy required to make an ethical kill on deer. I know it can be done with less but I don't thik it should. I know I will here all types of stories but this IMO.

 

[Levi Garrett]

Cheetah or 22-250 , barrel life subject to loads , and barrel care .

 

[Camp Cook]

Not my chart you can find the Ballistic Calculator I used here -> http://www.biggameinfo.com/index.aspx?page=/balcalc.ascx just put your info in and click on calculate.

 

[dan belisle]

For added "uniqueness" and a little performance gain, you could improve the 6-06, .25-06, or 6.5-06 to the Rocky Gibbs design. I love my .30 gibbs and I think the 6.5 gibbs would be pretty awsome too. In your case, the .25 gibbs might be a good one.

I use a 240 Gibbs for LR coyotes. Works very, very well out to 700 meters so far. Haven't had the chance to try it further. - dan

 

[dan belisle]

I've been thinking about rechambering my 26" barreled Ruger M77 to 22-middlested or 22-243 only thing that has been stopping me is its 1 - 12" twist.

I have a 22-243 Middlestead, 27" barrel, 1-14 twist. Next time it gets rebarreled, it will have a 1-8 twist I think. Still, it easily pushes 55 gr bullets well over 4000 fps accurately, so it does a pretty good job on that front.- dan

 

[Dogleg]

I have a 22-243 Middlestead, 27" barrel, 1-14 twist. Next time it gets rebarreled, it will have a 1-8 twist I think. Still, it easily pushes 55 gr bullets well over 4000 fps accurately, so it does a pretty good job on that front.- dan

When I built my 22-243 Middlested on a XR100 I used a 1-8" Lilja, then got the original 1-14 barrel fitted and chambered as a fireforming barrel. Ironically, the 1-14 shoots so well that it still lives there and the Lilja is gathering dust somewhere. I wish the barrel eating thing would kick in already.

 

[Camp Cook]

Hmmm I messed up in my earlier post my old Ruger 22-250 barrel is a 1 - 14" twist as well.

 

[Wrong Way]

so.....not to hijack....but I've been thinking about my earlier post.

Is a 17/243 middlestead actually doable?